# Copyright (c) 2017 The OpenRC Authors.
# See the Authors file at the top-level directory of this distribution and
# https://github.com/OpenRC/openrc/blob/master/AUTHORS
#
# This file is part of OpenRC. It is subject to the license terms in
# the LICENSE file found in the top-level directory of this
# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
# This file may not be copied, modified, propagated, or distributed
# except according to the terms contained in the LICENSE file.

#
# rc-service completion command
#
_rc_service()
{
	local cur prev numwords opts
	local words i x filename
	local action actionpos
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	prev="${COMP_WORDS[COMP_CWORD-1]}"
	numwords=${#COMP_WORDS[*]}

	if [[ ${prev} == '>' || ${prev} == '<' ]] ; then
		COMPREPLY=($(compgen -f -- ${cur}))
		return 0
	fi

	# find action
	for x in ${COMP_LINE} ; do
		if [[ ${x} =~ --(list|exists|resolve) ]] || [[ ${x} =~ -(l|e|r) ]]
		then
			action=${x}
			break
		fi
	done
	if [[ -n ${action} ]]; then
		for ((i = 0; i < ${numwords}; i++ )); do
			if [[ ${COMP_WORDS[${i}]} == "${action}" ]]; then
				actionpos=${i}
				break
			fi
		done

		for ((i = 1; i < ${numwords}; i++ )); do
			if [[ ! ${COMP_WORDS[$i]} == -* ]]; then
				break
			fi
		done
	fi

	if [[ ${COMP_CWORD} -eq 3 ]]; then
		return 1
	fi

	# check if an option was typed
	if [[ ${cur} == -* ]]; then
		if [[ ${cur} == --* ]]; then
			opts="--list --exists --resolve"
			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
			return 0
		elif [[ ${cur} == -* ]]; then
			opts="-l -e -r"
			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
			return 0
		fi

		# NOTE: This slows things down!
		# (Adapted from bash_completion by Ian Macdonald <ian@caliban.org>)
		# This removes any options from the list of completions that have
		# already been specified on the command line.
		COMPREPLY=($(echo "${COMP_WORDS[@]}" | \
		(while read -d ' ' i; do
			[[ -z ${i} ]] && continue
			# flatten array with spaces on either side,
			# otherwise we cannot grep on word boundaries of
			# first and last word
			COMPREPLY=" ${COMPREPLY[@]} "
			# remove word from list of completions
			COMPREPLY=(${COMPREPLY/ ${i%% *} / })
		done
		echo ${COMPREPLY[@]})))

		return 0
	else
		# no option was typed
		if [[ ${COMP_CWORD} -eq 1 ]]; then			  # if first word typed
			words="$(rc-service --list | grep ^${cur})"		  # complete for init scripts
			COMPREPLY=($(for i in ${words} ; do \
			[[ ${i} == ${cur}* ]] && echo ${i} ; \
			done))
			return 0
		elif [[ ${COMP_CWORD} -eq 2 ]] && [[ ${prev} != -* ]]; then # if second word typed and we didn't type in a function
			rc-service --exists "$prev" || return
			shopt -s extglob
			while read -r _ line; do
				if [[ $line == +([[:alnum:]_]):* ]]; then
					opts+="${line%%:*} "
				fi
			done < <(rc-service "$prev" describe 2>&1)
			shopt -u extglob
			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
			return 0
		fi
	fi
	if [[ ${action} == '--exists' ]] || [[ ${action} == '-e' ]] || \
		[[ ${action} == '--resolve' ]]  || [[ ${action} == '-r' ]]; then
		words="$(rc-service --list | grep ^${cur})"
		COMPREPLY=($(for i in ${words} ; do \
			[[ ${i} == ${cur}* ]] && echo ${i} ; \
		done))
		return 0
	fi
	return 0
} &&
complete -F _rc_service rc-service
